Compare running cost and emissions of your current system with an efficient one
Beginner8h1–2
Next.jsCharts
17/20#calculator hackathon ideas
9 ideas across 2 categories · 8 beginner · 1 intermediate · 0 advanced. Sorted by judging fit (editorial estimate).
Ideas tagged calculator
Photograph energy labels in a store and compare lifetime running costs
Beginner8h1–2Tesseract.jsNext.jsCharts17/20Estimate how much rainwater your roof can collect and what tank to buy
Beginner8h1–2LeafletNext.jsCharts17/20Fintech
True-Cost Loan Comparator
Compare loans by total cost including fees, not just the headline rate
Beginner8h1–2Next.jsChartsLLM17/20Fintech
EMI Affordability Checker
See whether an EMI fits your budget before you buy
Beginner6h1Next.jsCharts16/20Fintech
Freelancer Rate Calculator
Work out an hourly rate that covers taxes, tools, holidays and savings
Beginner6h1Next.jsCharts16/20Fintech
Shift Worker Pay Calculator
Check your payslip against your shifts, overtime and night rates
Beginner8h1Next.jsLocal storage16/20Fintech
Debt Snowball Planner
Compare snowball and avalanche strategies and get a payoff date
Beginner8h1Next.jsCharts16/20Climate
Solar Roof Estimator
Estimates yearly solar output and payback for a roof
Intermediate24h1–3PythonpvlibReact15/20